Add a 32-bit/64-bit string to chrome://version.

chrome/browser/ui/webui/version_ui.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/version_ui.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 65 matching lines @@
   base::Time::Now().LocalExplode(&exploded_time);
   html_source->AddString(
       "copyright",
       l10n_util::GetStringFUTF16(IDS_ABOUT_VERSION_COPYRIGHT,
                                  base::IntToString16(exploded_time.year)));
   html_source->AddLocalizedString("revision", IDS_ABOUT_VERSION_REVISION);
   html_source->AddString("cl", version_info.LastChange());
   html_source->AddLocalizedString("official",
       version_info.IsOfficialBuild() ? IDS_ABOUT_VERSION_OFFICIAL :
                                        IDS_ABOUT_VERSION_UNOFFICIAL);
+#if defined(ARCH_CPU_64_BITS)
+  html_source->AddLocalizedString("version_bitsize", IDS_ABOUT_VERSION_64BIT);
+#else
+  html_source->AddLocalizedString("version_bitsize", IDS_ABOUT_VERSION_32BIT);
+#endif
   html_source->AddLocalizedString("user_agent_name",
                                   IDS_ABOUT_VERSION_USER_AGENT);
   html_source->AddString("useragent", GetUserAgent());
   html_source->AddLocalizedString("command_line_name",
                                   IDS_ABOUT_VERSION_COMMAND_LINE);
 
 #if defined(OS_WIN)
   html_source->AddString(
       "command_line",
       base::WideToUTF16(
@@ skipping 46 matching lines @@
   // Set up the chrome://theme/ source.
   ThemeSource* theme = new ThemeSource(profile);
   content::URLDataSource::Add(profile, theme);
 #endif
 
   WebUIDataSource::Add(profile, CreateVersionUIDataSource());
 }
 
 VersionUI::~VersionUI() {
 }